If you don’t wish to use the 2.5.5 update, the installer below will do a fresh installation of VDL 2.5.0 on OS X 10.5 (and higher) without needing to download any other patches from Native Instruments. To remedy this problem, we recommend you update to the 2.5.5 Library Update.
This is due to the way newer versions of Mac OS X handle the VDL installer application on your DVD. The Virtual Drumline 2.5 installer on your original VDL 2.5 DVD may not work properly if you’re doing a new installation of VDL 2.5.0 on a newer Macintosh (OS X 10.5 or newer).
Note: This is not necessary if using the more current VDL 2.5.5 library update.